{
 "ocl_version": "0.1.0",
 "name": "Hathaway Street",
 "slug": "hathaway-street",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 22.582407966066853,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 80.0,
   "end_distance_m": 82.0,
   "start_elevation_m": 214.83395294221685,
   "end_elevation_m": 215.2856011015382,
   "min_gradient_pct": -1.9883016681859544
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 22.303564620878547,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 79.0,
   "end_distance_m": 82.0,
   "start_elevation_m": 214.61649416291183,
   "end_elevation_m": 215.2856011015382,
   "min_gradient_pct": -1.3916012466647014
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 22.073322257795667,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 78.0,
   "end_distance_m": 83.0,
   "start_elevation_m": 214.39924217085775,
   "end_elevation_m": 215.50290828374753,
   "min_gradient_pct": -0.802602572999831
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.9341985179625,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 73.0,
   "end_distance_m": 83.0,
   "start_elevation_m": 213.30948843195128,
   "end_elevation_m": 215.50290828374753,
   "min_gradient_pct": -0.12815710786753698
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.98899025680126,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 73.0,
   "end_distance_m": 93.0,
   "start_elevation_m": 213.30948843195128,
   "end_elevation_m": 217.50728648331153,
   "min_gradient_pct": 1.017141381524027
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.904587033829785,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 73.0,
   "end_distance_m": 98.0,
   "start_elevation_m": 213.30948843195128,
   "end_elevation_m": 218.53563519040873,
   "min_gradient_pct": 1.4824170979635483
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.861152383371177,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 72.0,
   "end_distance_m": 122.0,
   "start_elevation_m": 213.12029158643244,
   "end_elevation_m": 223.05086777811803,
   "min_gradient_pct": 4.603303460890231
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.466901457732973,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 70.0,
   "end_distance_m": 170.0,
   "start_elevation_m": 212.82871427848013,
   "end_elevation_m": 231.2956157362131,
   "min_gradient_pct": 10.99299964760226
  }
 ],
 "shape": {
  "ascent_concentration": 0.373,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 183.0,
  "shape_class": "sustained"
 },
 "length_m": 232.99999999987102,
 "start_elevation_m": 207.93519600494426,
 "end_elevation_m": 238.45395708722532,
 "endpoint_gain_m": 30.51876108228106,
 "overall_gradient_pct": 13.09818072201629,
 "accumulated_ascent_m": 30.567563036227142,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 22.073322257795667,
   "start_distance_m": 78.0,
   "end_distance_m": 83.0,
   "midpoint_distance_m": 80.5,
   "start_elevation_m": 214.39924217085775,
   "end_elevation_m": 215.50290828374753,
   "start_xy": [
    653883.6072360041,
    4729683.036620056
   ],
   "end_xy": [
    653888.6011804315,
    4729682.790622782
   ]
  },
  "max_10m": {
   "gradient_pct": 21.9341985179625,
   "start_distance_m": 73.0,
   "end_distance_m": 83.0,
   "midpoint_distance_m": 78.0,
   "start_elevation_m": 213.30948843195128,
   "end_elevation_m": 215.50290828374753,
   "start_xy": [
    653878.6104028525,
    4729683.185042986
   ],
   "end_xy": [
    653888.6011804315,
    4729682.790622782
   ]
  },
  "max_20m": {
   "gradient_pct": 20.98899025680126,
   "start_distance_m": 73.0,
   "end_distance_m": 93.0,
   "midpoint_distance_m": 83.0,
   "start_elevation_m": 213.30948843195128,
   "end_elevation_m": 217.50728648331153,
   "start_xy": [
    653878.6104028525,
    4729683.185042986
   ],
   "end_xy": [
    653898.5806872528,
    4729682.156802989
   ]
  },
  "max_25m": {
   "gradient_pct": 20.904587033829785,
   "start_distance_m": 73.0,
   "end_distance_m": 98.0,
   "midpoint_distance_m": 85.5,
   "start_elevation_m": 213.30948843195128,
   "end_elevation_m": 218.53563519040873,
   "start_xy": [
    653878.6104028525,
    4729683.185042986
   ],
   "end_xy": [
    653903.5687701524,
    4729681.811797251
   ]
  },
  "max_50m": {
   "gradient_pct": 19.861152383371177,
   "start_distance_m": 72.0,
   "end_distance_m": 122.0,
   "midpoint_distance_m": 97.0,
   "start_elevation_m": 213.12029158643244,
   "end_elevation_m": 223.05086777811803,
   "start_xy": [
    653877.6104153523,
    4729683.190042923
   ],
   "end_xy": [
    653927.5116392416,
    4729680.156806312
   ]
  },
  "max_100m": {
   "gradient_pct": 18.466901457732973,
   "start_distance_m": 70.0,
   "end_distance_m": 170.0,
   "midpoint_distance_m": 120.0,
   "start_elevation_m": 212.82871427848013,
   "end_elevation_m": 231.2956157362131,
   "start_xy": [
    653875.6104403519,
    4729683.200042798
   ],
   "end_xy": [
    653941.4493869744,
    4729720.134450963
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -0.802602572999831,
   "start_distance_m": 2.0,
   "end_distance_m": 7.0,
   "midpoint_distance_m": 4.5,
   "start_elevation_m": 207.93923916604172,
   "end_elevation_m": 207.89910903739172,
   "start_xy": [
    653867.5659914579,
    4729620.520881597
   ],
   "end_xy": [
    653867.9220136984,
    4729625.508189876
   ]
  },
  "min_10m": {
   "gradient_pct": -0.12815710786753698,
   "start_distance_m": 0.0,
   "end_distance_m": 10.0,
   "midpoint_distance_m": 5.0,
   "start_elevation_m": 207.93519600494426,
   "end_elevation_m": 207.9223802941575,
   "start_xy": [
    653867.423,
    4729618.526
   ],
   "end_xy": [
    653868.1359680167,
    4729628.50055043
   ]
  },
  "min_20m": {
   "gradient_pct": 1.017141381524027,
   "start_distance_m": 0.0,
   "end_distance_m": 20.0,
   "midpoint_distance_m": 10.0,
   "start_elevation_m": 207.93519600494426,
   "end_elevation_m": 208.13862428124907,
   "start_xy": [
    653867.423,
    4729618.526
   ],
   "end_xy": [
    653868.7040197273,
    4729638.483458314
   ]
  },
  "min_25m": {
   "gradient_pct": 1.4824170979635483,
   "start_distance_m": 0.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 12.5,
   "start_elevation_m": 207.93519600494426,
   "end_elevation_m": 208.30580027943515,
   "start_xy": [
    653867.423,
    4729618.526
   ],
   "end_xy": [
    653868.9169966246,
    4729643.478919713
   ]
  },
  "min_50m": {
   "gradient_pct": 4.603303460890231,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 207.93519600494426,
   "end_elevation_m": 210.23684773538938,
   "start_xy": [
    653867.423,
    4729618.526
   ],
   "end_xy": [
    653869.7259891581,
    4729668.465638605
   ]
  },
  "min_100m": {
   "gradient_pct": 10.99299964760226,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 207.93519600494426,
   "end_elevation_m": 218.92819565254652,
   "start_xy": [
    653867.423,
    4729618.526
   ],
   "end_xy": [
    653905.5640032712,
    4729681.673794363
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 22.582407966066853,
   "start_distance_m": 80.0,
   "end_distance_m": 82.0,
   "midpoint_distance_m": 81.0,
   "start_elevation_m": 214.83395294221685,
   "end_elevation_m": 215.2856011015382,
   "start_xy": [
    653885.6048246073,
    4729682.938439649
   ],
   "end_xy": [
    653887.60238117,
    4729682.839612936
   ]
  },
  "max_3m": {
   "gradient_pct": 22.303564620878547,
   "start_distance_m": 79.0,
   "end_distance_m": 82.0,
   "midpoint_distance_m": 80.5,
   "start_elevation_m": 214.61649416291183,
   "end_elevation_m": 215.2856011015382,
   "start_xy": [
    653884.6060352656,
    4729682.987629903
   ],
   "end_xy": [
    653887.60238117,
    4729682.839612936
   ]
  }
 },
 "diagnostic_note": "Windows <=3 m are at raster-noise scale (1-sigma raster noise alone is roughly +/-7 pp at 2 m and +/-5 pp at 3 m on a 1 m DTM). Diagnostic use only: never a headline or ranking value.",
 "quality_summary": {
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.269,
   "obstruction_max_height_m": 26.26,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "review": [],
  "extent": [
   "may_continue_beyond_end"
  ]
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "sample_interval_m": 1.0,
  "interpolation": "bilinear",
  "smoothing": "none",
  "gradient_windows_m": [
   5.0,
   10.0,
   20.0,
   25.0,
   50.0,
   100.0
  ],
  "diagnostic_windows_m": [
   2.0,
   3.0
  ],
  "elevation_crs": "EPSG:26918",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/ma/USGS_1M_18_x65y473_MA_Western_B24.tif"
  ],
  "calculated_at": "2026-09-03T22:41:58+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/massachusetts-260822.osm.pbf",
  "osm_snapshot": "2026-08-21T20:21:11Z",
  "run_id": "extent-trim-v2-260903",
  "elevation_provider": "USGS 3DEP (The National Map)",
  "elevation_licence": "Public domain \u2014 USGS 3DEP 1 m DEM, courtesy of the U.S. Geological Survey",
  "elevation_dataset": "USGS 3DEP 1 m DEM, MA_Western_B24 (collected 2023-24)",
  "elevation_tile_ids": [
   "x65y473"
  ],
  "route_cut_m": 233.0,
  "climb_origin": "discovered",
  "canopy_source": {
   "kind": "ept_corridor_max_return",
   "ept_source": "https://usgs-lidar-public.s3-us-west-2.amazonaws.com/USGS_LPC_MA_ME_MA_QL2_UTM18_L1_2015_LAS_2018",
   "ept_crs": "EPSG:3857",
   "station_coverage": 0.996,
   "cell_ground_m": 1.0,
   "nodes_failed": 0
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "North Adams",
  "county": "Massachusetts"
 }
}